Hi guys long time reader 1st time poster, i have a 929 with power commander 3, slip on can, flapper removed other than that stock, just got it back from having it dyno tuned with custom map...took it there cause always since i owned it it always seemd rich like fluttery sounding in certain rpms and always u could goose it and get loaded up fuel smoke out of the exhaust, all there test passed good compression etc... got it back and it still has that fluttery feel/sound to it.. I checked EGCV VALVE for sticky or non rotation, I found the indexing with ignition swith on no start 90deg (correct) but from there its opposite rev to 3000 rpm should rotate to 0 deg it rotates to 180 deg everything seems routed correct I have the manual any ideas of what could be going on ,,,the only code ever pulled was 19 it cleared and so far so good,, just to me it seems opposite rotation of the EGCV valve it's going the opposte direction from what the manual states thanks for reading I hope someone has some input cause im spinnin my wheels

 

It sounds like the cables from the servo motor to the exhaust valve are reversed. If the servo motor was replaced because of stripped gears then the cables could have been installed wrong on the servo motor. Each cable must be installed in the correct position for the system to work correctly. Did you perform the cable adjustment mode by jumping the service connector under the seat? When the service connector is jumped with a wire and the key turned on the exhaust valve should rotate to 180(down) to allow you to adjust the bottom cable to align the index marks. If yours rotates to 0(up) then the cables are reversed.

If you have not cleaned the exhuast valve I would recommend taking it apart and cleaning it with parts cleaner and fine grit sandpaper to remove as much of the carbon build up as possible. This will allow smoother operation and put less strain on the servo motor.

Also there is no gain in removing the flapper in the airbox. All you get is increased intake noise when it is removed.

 

I just read this you were on the money, after staring at the repair manual for it seemed like hours you hit nail on the head, it made a difference it was just like you said it also had a code 19 in the memory that could have been set long ago it cleared out and so far has not come back
the tone,idle And revs are on point,,,pulls great it just has this flutter sound out of the can almost rich sounding but no soot, no poping during decel just that flutter type sound
thank you
i just need to figure this flutter issue out, its a puzzle if I have no codes to point me at the next direction